Knowledgebase Banner Advert

I can't receive email right now because it says the mailbox is locked?

Because of the way POP3 works, it's impossible to be logged in to the same mailbox with two sessions at the same time: to do so would cause some of your emails to disappear. So, to prevent this and ensure that your emails are delivered promptly, you'll see the message: 

-ERR Mailbox still locked: you're checking mail too frequently. 

...if you log in to your mailbox less than 2 minutes after your last login. If your mailbox is held open for more than two minutes and you try to check your mail again, you'll see the message: 

-ERR Mailbox already locked. 

If this second message persists (happens a number of times in a day) then you may want to contact customer services to see if there's some external factor affecting your mailbox access. 

If you're getting the first message, all you need to do is set your email client to check mail less frequently. 

Do ensure that you don't have two separate machines checking mail at the same time which is a common cause of this issue.
  • 0 Users Found This Useful
Was this answer helpful?

Related Articles

I'm getting a 451 Message temporarily deferred message when sending to Yahoo or BT - What does this mean?

Yahoo have extremely strict criteria for accepting email and often defer e-mail if they...

Why is my mail client downloading duplicates of existing emails?

This issue will only occur when downloading mail via POP3. It is not something to...

How do I recover deleted mail in Exchange?

To recover mail that has been removed from the 'Deleted Items' folder in...

I can't send email, but I can receive it.

If you are having trouble sending mail but not receiving it, there is a possibility that...

Why does my email bounce with '550 relay not permitted'?

This usually happens because the nameservers on the affected domain have been...